Six-Phase Electric Machines (eBook)

Jonas Juozas Buksnaitis, is an Engineer of Electromechanics and Electrical Science and a professor at Aleksandras Stulginskis University, Kaunas, Lithuania.

Preface 5
Introduction 7
Contents 9
List of Main Symbols and Abbreviations 11
Chapter 1: General Specification of Six-Phase Windings of Alternating Current Machines 15
1.1 Harmonic Spectrum of Magnetomotive Force Generated by the Six-Phase Current System 16
1.2 Six-Phase Voltage Sources and Peculiarities of Connecting Them to Six-Phase Windings 21
1.3 General Aspects of Six-Phase Windings 25
1.4 Evaluation of Electromagnetic Properties of Six-Phase Windings 27
1.5 Conclusions 34
Chapter 2: Research and Evaluation of Electromagnetic Properties of Single-Layer Six-Phase Windings 36
2.1 Concentrated Six-Phase Windings 36
2.2 Preformed and Concentric Six-Phase Windings with q = 2 41
2.3 Six-Phase Chain Windings with q = 2 46
2.4 Preformed and Concentric Six-Phase Windings with q = 3 51
2.5 Six-Phase Chain Windings with q = 3 56
2.6 Conclusions 61
Chapter 3: Research and Evaluation of Electromagnetic Properties of Two-Layer Six-Phase Windings 62
3.1 Two-Layer Preformed Six-Phase Windings with q = 2 62
3.2 Maximum Average Pitch Two-Layer Concentric Six-Phase Windings with q = 2 66
3.3 Short Average Pitch Two-Layer Concentric Six-Phase Windings with q = 2 72
3.4 Two-Layer Preformed Six-Phase Windings with q = 3 77
3.5 Maximum Average Pitch Two-Layer Concentric Six-Phase Windings with q = 3 83
3.6 Short Average Pitch Two-Layer Concentric Six-Phase Windings with q = 3 88
3.7 Conclusions 93
Chapter 4: Research and Evaluation of Electromagnetic Properties of Two-Layer Preformed Fractional-Slot Six-Phase Windings 94
4.1 Two-Layer Preformed Six-Phase Windings with q = 1/2 94
4.2 Two-Layer Preformed Six-Phase Windings with q = 3/2 97
4.3 Two-Layer Preformed Six-Phase Windings with q = 5/2 101
4.4 Conclusions 105
Chapter 5: Investigation and Comparison of Three-Phase and Six-Phase Cage Motor Energy Parameters 106
5.1 Research Object 106
5.2 Evaluation of Parameters of Single-Layer Preformed Six-Phase Winding 107
5.3 Cage Motor Research Results 111
5.4 Conclusions 117
Bibliography 119
Index 121